Question

Tiga buah bilangan (x + 1) , (2x - 1) dan (2x+2) membentuk barisan aritmatika , tentukan bilangan-bilangan yang menyusun barisan aritmatika tersebut.

Answer 1

B = b
U2 - U1 = U3 - U2
(2x - 1) - (x + 1) = (2x + 2) - (2x - 1)
2x - 1 - x - 1 = 2x + 2 - 2x + 1
x - 2 = 3
x = 3 + 2
x = 5
U1/a = x + 1
= 5 + 1
= 6
U2 = 2x - 1
= 2(5) - 1
= 10 - 1
= 9
U3 = 2x + 2
= 2(5) + 2
= 10 + 2
= 12
semoga membantu